Product Description Ensure climate control in your vehicle with this quality HVAC Heater Blend Door Actuator. Designed for precise fitment and reliable performance, it restores proper airflow direction and temperature regulation, helping you maintain comfort in all driving conditions. Key Features and Benefits: **Precise Compatibility**: Direct fit for specific models including Buick Skylark 1991, Cadillac Escalade 1999 and 20022006, Escalade ESV 20032006, and Chevrolet Astro 19962005. Always confirm compatibility using the Fitment Filter before . **Exact Replacement**: Replaces OEM part numbers 604100, 89018356, 14455963, and 16124922 for easy installation without modifications. **Reliable Function**: Controls the movement of the blend door in the HVAC system to regulate hot and cold air mixing, ensuring accurate cabin temperature adjustments. **Versatile Location Fit**: Suitable for use in Main, Auxiliary, Auxiliary or Main Rear HVAC positions depending on vehicle configuration. **Durable Build**: Manufactured to meet OEM specifications, offering longlasting performance under repeated use. Practical Applications: 1. Restoring proper heating and cooling balance in the cabin after a faulty actuator causes inconsistent airflow or wrong temperature output. 2. Maintaining passenger comfort during seasonal changes by ensuring the HVAC system delivers the selected temperature accurately to all zones. 3. Supporting defrost function by directing warm air effectively to the windshield when needed. This HVAC Heater Blend Door Actuator is an essential component for resolving climate control issues in compatible vehicles. Its precise design and dependable operation make it the right choice for both professional mechanics and vehicle owners seeking a straightforward replacement that works just like the original.